Air-tight cover for jars and bottles.



S. W. PASCALL. AIR TIGHT COVER FOR JARS AND BOTTLES.

APPLICATION FILED MAR. 26, 1914.

Patented May 4, 1915.

SYDNEY WOOIDROFEE PASCALL, OF LONDON, ENGLAND.

AIR-TIGHT COVER FOR JARS AND BOT'LLES.

Specification of Letters Eatent.

Patented May a, 1915,

Application filed March 26, 1914. Serial No. 827,294.

To all whom it may concern:

Be it known that I, SYDNEY Woonnorrn PASCALL, a subject of the King ofGreat Britain, residing at London, England, have invented certain newand useful Improvements in Air-Tight Covers for J ars and Bottles, ofwhich the following is a full, clear, and exact description.

The object of this invention is to produce air tight covers for jars andbottles in an economical way. For this purpose I employ a thin metaldisk between the screw cap and the cork disk in a'manner I shall nowdescribe with the aid of the accompanying drawings, wherein Figure 1 isa vertical section of the outer cap forming part of my invention; Fig. 2is a vertical section of the thin, circular me tallic dlsk which Iemploy; Fig. 3 is a vertical section of the cork disk, and Fig. 4 is asection taken across the top of a jar, showing my improved coverassembledthereupon. i

Referring to the drawings, the cap, which isindicated by a, is of theordinary construction except that it is concaved throughout, the entirearea of its top portion, while the disk or stretcher b, which is made ofthin metal of slightly less diameter than cap a, is concaved throughoutthe major portion of its central area, though it's concavity ispreferabl not as deep as that in the cap. The sea in disk, WhlCll isindicated by 0, may be of cor or other pliable material and is of.-,ulficie nt area to cover the mouth of the 'iottle or jar which isindicated by d.

In assembling my improved cover, the disk 0 is placed across the mouthof the jar, the metallic disk I) with its concave surface facingupwardly, is placed on top of'disk 0 and the cap a is screwed down uponthe neck of the jar inthe usual manner, the convex surface of, the capengaging the concave surface of the metallic disk, while the latterstretches the cork disk across the mouth of the bottle or jar and at thesame time compresses the outer edge of the cork on the top of thebottle.

It will be noted that the concavity of the 'outer cap a is somewhatdeeper than that prising a cover having a threaded flange for securingit over the mouth of the receptacle and a centrally dished portion, adisk of flexible material positioned on the top and over the mouth ofsaid receptacle, and a centrally dished metallic disk interposed betweenthe fiexible'disk and the cover, the dished portions of said cover andlast named dish engaging each other when 'said cover is screwed downover the mouth of the receptacle.

2. A. closure for jars or other receptacles having a relatively largemouth comprising an outer dished cover having a threaded flange forconnecting it to the receptacle, a cork disk upon the end of thereceptacle a dished disk interposed between said cork disk and the saidcover, said disk having its dishing somewhat shallower than the dishingof the rover whereb thesaid cover primarily engages said dis in thecenter.

In testimony whereof l have afiixed my signature in presence of twowitnesses.

fillDNEY WOODEOFFEPASOALL-

